I know, to banish anger altogether from one's breast is a difficult task. It cannot be achieved through pure personal effort. It can be done only by God's grace.
Evil company is always to be shunned; because it leads to lust and anger, illusion, forgetfulness of the goal, destruction of the will (lack of perseverance), and destruction of everything. (Narada Bhakti Sutra)
Try to understand why it is happening, from where it is coming, where the roots are, how it happens, how it functions, how it overpowers you, how in anger you become mad. Anger has happened before, it is happening now, but now add a new element to it, the element of understanding -- and then the quality will change. Then, by and by, you will see that the more you understand anger, the less it happens. And when you understand it perfectly, it disappears. Understanding is like heat. When the heat comes to a particular point -- one hundred degrees -- the water disappears.
As soon as we react, we become slaves. A man blames me, and I immediately react in the form of anger. A little vibration which he created made me a slave.
Compassion is not against anger. When anger disappears, compassion is. Compassion is not to be fought for; it is not against passion. When passion disappears, compassion is. Compassion is your nature.